Effect of Nb on nanoquasicrystalline Al-based alloys |
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| Authors: | M. Galano F. Audebert I. C. Stone B. Cantor |
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| Affiliation: | 1. Department of Materials , University of Oxford , Parks Road, Oxford OX1 3PH, UK marina.galano@materials.ox.ac.uk;3. Department of Materials , University of Oxford , Parks Road, Oxford OX1 3PH, UK;4. Advanced Materials Group, Faculty of Engineering , University of Buenos Aires , Paseo Colón 850, Buenos Aires (1063), Argentina;5. Department of Materials , University of Oxford , Parks Road, Oxford OX1 3PH, UK;6. Vice-Chancellor's Office, University of York , Heslington York, YO10 5DD, UK |
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| Abstract: | Nanoquasicrystalline Al-based alloys, containing icosahedral particles in an α-Al matrix, exhibit high strength at elevated temperature. The metastability of the quasicrystals can limit the use of these alloys. In the present work, the microstructural evolution of Al93(Fe3Cr2)7 and Al93Fe3Cr2Nb2 (at%) alloys was studied using heat treatments and structural characterization by XRD, TEM and STEM-EDX analysis. It was observed that the Nb is dissolved in the Al–Fe–Cr icosahedral phase. This provides higher thermal stability, retaining the fine nanoquasicrystalline microstructure for longer times at high temperature. |
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| Keywords: | plasticity metallic glass short-range-order elastic modulus |
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